Keysight N9923A, User Manual, Page: 167 / 276

Keysight N9923-90001 User’s Guide 167
VVM (Vector Voltmeter) Mode - Option 308
VVM Mode Settings
This setting can be changed at any time without affecting calibration accuracy.
How to set Single or Continuous
— Press Meas Setup 4
— Then choose one of the following:
—
Single
Automatically sets Continuous OFF and causes the FieldFox to
make ONE measurement, then hold for the next Single key press. The
Hold
annotation changes to an arrow --> while the measurement
occurs.
—
Continuous ON Makes continuous measurements. This is the typical
setting when battery power is not critical.
— You can also use Run / Hold +/- to toggle between Single and Continuous.
VVM Calibration
Calibration of a VVM Mode measurement can be accomplished using one of
several methods depending on the desired level of accuracy. Learn more in
“How to Perform a Calibration” on page 104
.
— The simplest method is to use CalReady which is accurate at the test port
connectors. CalReady does not correct for the loss or delay of jumper
cables or adapters that may be used to connect the DUT to the FieldFox.
Learn more about CalReady in
“CalReady” on page 104
.
— The next simplest method is to perform a Zeroing.
— When using jumper cables or adapters to connect the DUT to the FieldFox,
the most accurate method is to perform a QuickCal or Mechanical Cal.
Learn more in
“Calibration Method Summary” on page 123
. Press
Zero OFF
before calibrating (sets Zero to OFF).
Zeroing
Zeroing, also known as Normalization, or Data/Memory, simply “Zeroes” the
Magnitude and Phase display when
Zero
is pressed. All subsequent
measurements are relative to the measurement that was made when Zero was
pressed.
When an instrument state is saved with Zero ON, the zeroing data is saved with
the state file, similar to how a calibration is saved with a state file.
— When performing a 1-Port Cable Trimming operation, a reference cable is
connected and measured. Then Zero is pressed, and subsequent cables are
measured and trimmed to match electrical length of the reference cable.
— For 2-port measurements, Zero is typically pressed when a THRU
connection is made in place of a DUT. Learn more in
“2-Port Transmission
Measurements” on page 171
.